Renfert Vario basic - FAQ - English

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EN
FAQ - English
For information on operating elements, see Fig. 1 on page 2 of this document.
For chapter indications, refer to the complete instruction manual on the internet.
Problem Possible cause Corrective action
No air and no abra-
sive
• Nozzle blocked.
• Nozzle blocked at grip and/or blasting
hose blocked.
• Kink(s) in the foot switch connector hose.
• Switch set to intermediate position.
• Pressure set too low.
• Open the blasting nozzle unit and clean the nozzle
(Fig. 23, 24, 25).
• Unscrew the nozzle from the handle and blow it out
with compressed air. Without reconnecting the noz-
zle, activate the foot switch to blow compressed air
through the hose.
• Inspect and correct the connecting hoses.
• Turn the switch until you feel it click into place.
• Open the pressure regulator further (recommended
pressure: 4 - 5 bar).
Air only and no or
very little abrasive
• Dirty or moist abrasive.
• Insufcientabrasiveintheunit.
• Intake hose blocked.
• Problems with the additional tank.
• Replace the abrasive.
• Add abrasive.
• Check that the intake hose is not kinked / pinched /
blocked. The intake hose must be securely attached
to the unit base (Fig. 7).
• Refer to “Additional tank - Mounting instructions”,
No. 21-9774.
Reduced blasting
force
• Function selector switch not properly set.
• Nozzle worn.
• Abrasive used up.
• Abrasive feed hose is blocked /
damaged / kinked.
• Insufcientabrasiveinthereservoir.
• Make sure the selector switch clicks into place.
• Replace the nozzle.
• Replace the abrasive.
• Drain the abrasive out and inspect / replace the feed
hose.
• Add abrasive.
Excessive abrasive
consumption
• Extraction power set too high. • Reduce the extraction power.
Blasting chamber
lls with dust.
• Insufcientextractionpower.
• Extractor dust bag full.
• The suction performance of a weak extraction unit
can be increased by closing the boreholes on the
back side of the unit (Fig. 14, Pos. b) with the sup-
plied magnetic foil.
• Clean the extractor / replace the dust bag.
Abrasive spurts in
pulses.
• Nozzle connectors not vertical.
• Abrasive used up or too dirty.
• Kink in the suction hose.
• Make sure the nozzle is vertical.
• Replace the abrasive.
• Inspect the feed hose.
Unit continuously
blasting and stops
when foot switch is
activated.
• Foot switch connected incorrectly. • Inspect and correct the foot switch connection.
Foot switch fails to
switch on.
• No pressure at the compressed air con-
nection.
• Kink(s) in the pneumatic hoses.
• Inspect the compressed air lines and compressor.
• Realign the hoses.
Air leaking from the
foot switch.
• Pneumatic hoses connected incorrectly. • Replace the connectors.